What Size Coils Do People Use For Coin And Jewelry Hunting?

Oops, guess that would help. I am using the factory 8" right now. Usually I hunt playgrounds, parks and residential lots. I discriminate a lot but by doing so, I know I am giving up some treasures. I think a smaller coil would allow me to discriminate less since the coils will be more accurate and whatnot.

Like I use a whites coin GT and I use the 4" double d for when I hunt at the parade field on post here because there are a lot of empty rifle shells from when soldiers train so if a coin is close to one I can easily find where the coin is with a smaller coil

I learned a long time ago to dig every target. This pays off in two ways.

#1 you might dig a ring that would rang up as a pull tab.

#2 If you hit an area repeatedly and dig a lot of trash, eventually the trash will be gone and the good stuff will start coming out of the ground then.

I have a Garrett AT Pro and I'd have to agree. I bought a 5 x 4.5 coil and its great, better than the 8"pending where you go hunting. Wanting to get the sniper coil for more trashy areas and hard to get spots, Their Pin pointers are not that great I have returned two of them and each one I got was worse than the other. it wouldn't shut off on me...anyway good luck with you're new coil.

Since I dig every target the size of the coil does not really other than to allow me to cover larger areas of sparse targets faster.
I like that the AT pro will pinpoint even when there are multiple targets under the coil. I rarely use my Propointer.
All it takes is digging up one gold ring that rang up as a pull tab and you just have to keep digging everything.

Daniels....I would dig all of those empty rifle shells...keep them and once you get a big bag full sell them for their brass content...anyway all of those targets are hiding the goodies below and around them....Joe

I have an AT Pro that came with a 8.5x11 DD coil and a 5x8 DD coil. This is my first detector and, being a novice still, I've just stuck with what works and have only used the larger coil so far. Do you guys think I could be missing good finds? So far, the big coil goes 'beep' and I'm digging up good things. So, how do I know when to use the smaller one?

A large coil like a 10 to 12 inch coil is good for covering a large area. 12 inches and larger are good for Cache and bottle dump hunting. If you are hunting a known old coin spot then the 4 to 6 inch coil would do fine. Most detectors come with a standard coil around 8 to 9 inches....not too small but not too big so it can do relatively well in most of the aspects of Treasure Hunting. I like the 6 to 8 inch coil's the best in my normal hunting situations....Joe